@sc my phone's firmware was the one of my service providers'. It has a few bloat-y apps preinstalled and "Orange F" written on the notification area (like on older iPhones with the carrier text), and I had to wait extra delay for new firmware versions the time Orange applies its modifications to it and distribute it (which in some cases also never happens)

Samsung lets you use a tool named "Odin" to easily switch firmwares, so I installed the firmware that would be installed by default if I